Crustaceenreste aus den Mesosaurierschichten (Unterperm) von Brasilien (São Paulo)

Beurlen, Karl

doi:10.1007/bf03043321

Cited by 14 publications

(20 citation statements)

References 4 publications

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“…In this respect, Paulocaris and Notocaris from Permian deposits of Brazil and South Africa, respectively, provide good examples. Before Brooks (1962), Paulocaris was described by several authors as having a carapace with anterolateral spines (Clarke, 1920;Beurlen, 1931;Mezzalira, 1954). Kensley (1975) noticed the presence of anterolateral and lateral spines in Notocaris, a taxon which had been described by Broom (1931) as lacking marginal spines.…”

Section: Marginal Spinesmentioning

confidence: 99%

“…Despite the fact that several taxa have been described from the Permian deposits of Brazil (Clarke, 1920;Beurlen, 1931Beurlen, , 1934Mezzalira, 1952;Beurlen, 1953;Mezzalira, 1954;Pinto, 1960Pinto, , 1971Pinto, , 1972Pinto & Adami-Rodrigues, 1996) our knowledge of South American pygocephalomorphs is very sparce. Brazilian pygocephalomorph species were recovered from calcareous as well as shale strata of the Irati Formation, indicating a distinct distribution related to habitat preferences (Piñeiro, 2002).…”

Section: Introductionmentioning

confidence: 96%

“…Brazilian pygocephalomorph species were recovered from calcareous as well as shale strata of the Irati Formation, indicating a distinct distribution related to habitat preferences (Piñeiro, 2002). Liocaris huenei Beurlen, 1931 and Liocaris angusta (Beurlen, 1931) were always associated with the shallow, calcareous facies, but Paulocaris pachecoi (Clarke, 1920) and Pygaspis brasiliensis Beurlen, 1934 seem to be restricted to deeper areas of the basin, represented by the oil-shales of the Irati Formation.…”

Section: Introductionmentioning

confidence: 99%

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Pygocephalomorph crustaceans from the early Permian of Uruguay: constraints on taxonomy

Piñeiro¹,

Morosi²,

Ramos³

et al. 2012

Rev. bras. paleontol.

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-Hoplita ginsburgi comb. nov. (Fabre & Huard) is described from the Early Permian Mangrullo Formation of Uruguay. It is a large to very large pygocephalomorph characterized by a combination of characters that includes the presence of a round carapace bearing short, anterolateral, spine-like processes and a posteriorly extended, V-shaped cervical groove. Other traits include well-developed angular or round pleomeral pleurae bearing terminal spine-like processes, a tail fan with large and rounded uropod exopod, lacking diaresis, a roughly trapezoidal telson that gives support to small lateral spines and a relatively large triangular caudal spine. This species is also distinguished by the presence of a putative, simplified endophragmal skeleton, a structure not previously described in pygocephalomorphs, but present in fossil and extant higher crustaceans, where its function, although not so well understood, has been related to support for the limb musculature. Sexual dimorphism appears in Hoplita with the recognition of gonopods in males and seminal receptacles in the females. The studied specimens include moulting exuvia distinct from live individuals. The status of Notocarididae, the only currently recognized Gondwanan family, was examined, as well as the strength of the characters previously recognized as diagnostic. The study of the Uruguayan pygocephalomorphs revealed that taphonomy is an important constraint for the recognition of inferred autapomorphic characters, making difficult the taxonomic assignation of newly discovered specimens. Therefore, the use of more complete diagnoses, based on the greatest possible set of characters, would provide a much-needed contribution to a better understanding of this extinct group of malacostracan crustaceans. Paleobiogeographic and paleoecological data are also given, based upon new information provided by the studied Uruguayan specimens.Key words: Pygocephalomorpha, Lower Permian, taphonomy, systematics, Mangrullo Formation, Uruguay.RESUMO -É descrita Hoplita ginsburgi comb. nov. (Fabre & Huard) do Permiano Inferior (Formação Mangrullo) do Uruguai. H. ginsburgi é um pygocefalomorfo de grande porte apresentando uma combinação de caracteres que inclui uma carapaça arredondada, com processos espiniformes anterolaterais curtos, e um sulco cervical posteriormente estendido, em forma de V. Outras características incluem pleuras abdominais com expansões angulares ou arredondadas, bem desenvolvidas que ostentam processos terminais espiniformes, cauda com exopodito do urópodo grande e arredondado, diarese ausente, télson aproximadamente trapezoidal que dá apoio a pequenos espinhos laterais e um espinho caudal triangular relativamente grande. Esta espécie também se distingue pela provável presença de um esqueleto interno endofragmal simplificado, uma estrutura ainda não descrita em pygocefalomorfos, mas presente em crustáceos superiores fósseis e recentes, onde sua função, embora não tão bem entendida, tem sido relacionada como suporte para a musculatura apendicular. D...

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Section: Marginal Spinesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Pygocephalomorph crustaceans from the early Permian of Uruguay: constraints on taxonomy

Piñeiro¹,

Morosi²,

Ramos³

et al. 2012

Rev. bras. paleontol.

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“…During the 20th century, records were found in the Carboniferous and Permian of the United States of America (Brooks, 1962;Schram, 1988;Hotton et al, 2002;Irham et al, 2010) and South Africa (Rogers & Du Toit, 1909;Broom, 1931;Fabre & Huard, 1967); and in the Permian of Russia (Schram, 1978), China (Taylor et al, 1998), South America (Clarke, 1920;Beurlen, 1931Beurlen, , 1934Beurlen, , 1953Mezzalira, 1954;Vieira et al, 1991;Piñeiro et al, 2012a), and most recently Italy (Jones et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Traditionally, three genera and six species are recognized from Brazil: Paulocaris pachecoi Clarke, 1920; P. marianoi Beurlen, 1953; Liocaris huenei Beurlen, 1931;L. angusta Beurlen, 1931; Pygaspis brasiliensis Beurlen, 1934 andP.…”

Section: Introductionmentioning

confidence: 99%

New species of Pygocephalomorpha (Crustacea) from the Irati Formation, Paraná Basin, RS, Southern Brazil

Adami-Rodrigues¹,

Pazinato²,

Pinto³

2017

Rev. bras. paleontol.

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-This paper presents three new genera and species of pygocephalomorph crustaceans from outcrops in Pantano Grande and Minas do Leão counties, State of Rio Grande do Sul, Southern Brazil. The silty shales present molds of mostly articulated crustaceans, in association with Glossopteris, insect remains and fish scales. These new genera expand the number of Pygocephalomorpha from the Irati Formation and contribute to the knowledge on the Gondwanan Malacostraca species.

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Alte Land- und Meeresverbindungen in West-Indien und Zentralamerika

Rutten¹

1935

Geol Rundsch

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Crustaceenreste aus den Mesosaurierschichten (Unterperm) von Brasilien (São Paulo)

Cited by 14 publications

References 4 publications

Pygocephalomorph crustaceans from the early Permian of Uruguay: constraints on taxonomy

Pygocephalomorph crustaceans from the early Permian of Uruguay: constraints on taxonomy

New species of Pygocephalomorpha (Crustacea) from the Irati Formation, Paraná Basin, RS, Southern Brazil

Alte Land- und Meeresverbindungen in West-Indien und Zentralamerika

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